Gluten-Free Double Chocolate Cookies

"These are probably the best gluten-free cookies I've ever made. Not chalky, but chewy. I haven't tried making these egg-free, but that might work. I make a flour mix for baking that is quarter each of rice, sorghum, tapioca, and chestnut flours, with a pinch of xanthan gum, then use it in place of flour...sifting or whisking helps. I dusted with confectioners' sugar...looks nice with the dark chocolate."

Melt 4 ounces chocolate chips, with butter and vanilla extract in the top of a double boiler over simmering water, stirring frequently and scraping down the sides with a rubber spatula to avoid scorching. Remove from heat.

Bake in the preheated oven until cookies are spread and top surface is slightly cracked, 12 to 15 minutes. Cool on the pan for 10 minutes before removing to cool completely on a wire rack to allow cookies to set.